altoalsimce.org->Customizable Word problem Solvers ->Age-> SOLUTION: Mary, that is sixteen years old, is four times together old as her brother. Just how old will certainly Mary be as soon as she is double as old together her brother? var visible_logon_form_ = false;Log in or register.Username: Password: register in one basic step!.Reset your password if friend forgot it."; return false; } "> log On Ad: end 600 altoalsimce.org Word troubles at edhelper.com

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Click here to view ALL difficulties on age Word ProblemsQuestion 185872: Mary, that is 16 years old, is four times together old together her brother. How old will Mary be once she is double as old as her brother? discovered 2 remedies by feliz1965, Fals:Answer by feliz1965(151)
(Show Source): You have the right to put this equipment on her website! Mary, who is 16 years old, is four times together old together her brother. Just how old will certainly Mary be once she is twice as old together her brother?If mary is 16 and also this is 4 times as old as her brother, climate we can say that her brothers is 4 years old.Let M = Mary"s age when she is 2x as old as her brother.16/M = 4/84M = 128M = 128/4M = 32 answer by Fals(5)
(Show Source): You have the right to put this systems on your website! I"m afraid feliz1965 is wrong and it provides absolutely no feeling to put an 8 in "16/M = 4/8" or to also use that equation at all. If mar was 32 years old together feliz says, then she brother would certainly be 20 years old... 32 is no twice as old as 20.The exactly answer is 24. Mary will certainly be 24 years old as soon as she is twice the age of her brothers (which will be 12).First, find the age of her brother when she is 16 years old:16=4xDivide both sides by 4:4=xSo mar is 16 and her brother is 4.Now we move onto the component where the asks just how old Mary will be as soon as she is twice as old together her brother:16+x=2(4+x)If girlfriend don"t understand why ns am using that equation, it is due to the fact that we space trying to uncover out how countless years it will take for mary to be double as old as her brother. Every year Mary and also her brother flourish one year older. For this reason whenever you include a year to mary (x) you need to also add a year to her brothers (x). We already know that mar is 16 year old, and her brother is 4 year old. We usage 2(4+x) since we"re looking for Mary"s age when she is "twice" as old together her brother.16+x=2(4+x)Multiply the 2 by the 4 and the x:16+x=8+2xSubtract 8 from both sides:8+x=2xSubtract x indigenous both sides:8=xSo currently we understand that in 8 year from Mary"s present age (16) she will be double as old as her brother (who will likewise be 8 years older indigenous his existing age, i m sorry is 4).

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So currently that we recognize x=8 we"ll usage the same equation we started with and also plug the 8 in wherein x is:16+x=2(4+x)16+8=2(4+8)Sixteen to add eight equals 24, and four add to eight equates to 12.24=2(12)So now we can currently see the 24 is twice as old together 12.Multiply 2 by 12:24=24In eight year Mary will be 24 and also her brother will certainly be 12. She will certainly be double as old as her brother as soon as she is 24 years old.16+8=244+8=12